82mm Circular vent and hose port.
thingiverse
These are the circular vents and a hose port I used when building my router table. Of course you can vent anything with them. They are super easy to print and install. Just drill an 82mm hole through the panel with a hole saw, slip the vent into place and then fix it in position with three screws. See them being installed here; https://www.youtube.com/watch?v=nQaQYGlRafs
Download Model from thingiverse
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